package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和对应的口味数据
     */
//    @Transactional //事务注解
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //向菜品表插入数据
         dishMapper.insert(dish);

         //获取indert语句生成的主键值
        Long dishId = dish.getId();
        log.info("菜品id,{}",dishId);

        //向口味表插入N条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors !=null && flavors.size() > 0 ){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishId);
            }
            //向口味表批量插入数据
            dishFlavorMapper.insertBatch(flavors);
        }


    }

    /**
     * 菜品分页查询
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
       Page<DishVO> page =  dishMapper.pageQuery(dishPageQueryDTO);
        long total = page.getTotal();
        List<DishVO> result = page.getResult();
        return new PageResult(total,result);
    }

    /**
     *根据id查询菜品信息
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品信息
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> dishFlavors =  dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     *根据id删除菜品
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {

        //起售中的菜品不能删除
        for (Long id : ids) {
          Dish dish = dishMapper.getById(id);
          if(dish.getStatus() == StatusConstant.ENABLE){
              //当前菜品处于起售中不能删除
              throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
          }
        }
        //被套餐关联的菜品不能删除
        List<Long> stMealIds = setmealDishMapper.getStMealIdsByDishIds(ids);
        if(stMealIds!=null && stMealIds.size() > 0 ){
            //当前菜品被套餐关联，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除菜品后关联的口味数据也需要删除
//            dishFlavorMapper.deleteByDishId(id);
//        }
        //根据id集合批量删除菜品
        dishMapper.deleteByIds(ids);
        //根据id 集合批量删除口味
        dishFlavorMapper.deleteByDishIds(ids);

    }

    /**
     * 修改菜品
     */
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);

        //修改口味信息
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors !=null && flavors.size() > 0 ) {
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishDTO.getId());
            }
            //向口味表批量插入数据
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 根据分类id查询菜品
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        //根据分类id查询菜品
        List<Dish> dishList = dishMapper.getByCategoryId(dish.getCategoryId());
        List<DishVO> dishVOList = new ArrayList<>();
        if(dishList!=null&&dishList.size()>0){
            for (Dish d : dishList) {
                DishVO dishVO = new DishVO();
                BeanUtils.copyProperties(d,dishVO);

                //根据id查询对应的口味
                List<DishFlavor> dishFlavors =  dishFlavorMapper.getByDishId(d.getId());
                dishVO.setFlavors(dishFlavors);
                dishVOList.add(dishVO);
                log.info("菜品为,{}",d.getId());
            }
        }
        //根据查询的菜品查询口味
        return dishVOList;
    }

    /**
     * 菜品启售/禁售
     */
    public void startOrStop(Integer status,Long id) {
        Dish dish  =  Dish.builder().id(id).status(status).build();
        dishMapper.update(dish);
    }
}
